append static method
Creates a LexerActionExecutor which executes the actions for
the input lexerActionExecutor
followed by a specified
lexerAction
.
@param lexerActionExecutor The executor for actions already traversed by
the lexer while matching a token within a particular
LexerATNConfig. If this is null, the method behaves as
though it were an empty executor.
@param lexerAction The lexer action to execute after the actions
specified in lexerActionExecutor
.
@return A LexerActionExecutor for executing the combine actions
of lexerActionExecutor
and lexerAction
.
Implementation
static LexerActionExecutor append(
LexerActionExecutor? lexerActionExecutor,
LexerAction lexerAction,
) {
if (lexerActionExecutor == null) {
return LexerActionExecutor([lexerAction]);
}
final lexerActions =
List<LexerAction>.from(lexerActionExecutor.lexerActions);
lexerActions.add(lexerAction);
return LexerActionExecutor(lexerActions);
}